The English people usually don't pronounce the Letter R unless its followed by a vowel as in "the doctor announced" and some other special cases ,so when they say "the car has broken down" it actually sounds like "the ca has broken down"
but it would be hard to say "the ca is green for example" so they just add an r at the end of any word that ends this way even if it doesn't have an r at the end of it
so "the idea is" will sound like "the idear is"
and "the idea has" will remain the same

the idear is
"the sofar is" equals "the sofa is"
"we sawr on tv" equal "we saw on tv"

The way blue collar folks from New York City, the Hudson Valley, Stamford/Greenwich, and some parts of western Fairfield County say "idea". Often pronounced this way by the working class Polaks, Italians, and Irish of the area.

Paul Sr. from OCC: "Yeah, I like workin' with Ricky, me and him come up with some good idears."

"My Uncle Tom is an old Polak bastard from Stamford, he's got some good idears!"